Floor scraper



H. FISCHER April 14, 1942.

FLOOR SCRAPER Filed Jan. 4, 1941 2 She'e'S--Sheetl l ATTORNEYS.

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' April 14, 1942; H. FISCHER f 2,279,454v

' FLOOR scR'APER Filed Jan. 4, 1941 2 sheets-sheet 2 h @e Alm@ W1 TNESSES:

Patented Apr. 14, 1942 UNITED STATES PATENT OFFICE I FLOOR SCRAPER Herbert Fischer, Plumsteadville, Pa. Application January 4, 1941, Serial No. 373,079

(ol. sii- 272) 10 Claims.

This invention relates to' floor scrapers. More specifically it has reference to scrapers useful in removing relatively thick and hardened incrustations from barn floors, chicken or pigeon loft oors, etc.

The main object of my invention is to provide a scraper especially suited to the above purpose, which is simple in construction; which is highly eilicient in its operation; which is easy of manipulation; and which is capable not only of loosening the hardened debris, but of concurrently breaking it up effectively.

As hereinafter more fully disclosed, I attain the above advantages not only in a scraper intended for power operation, but also in a scraper designed for manual use.

Other objects and attendant advantages will appear from the following detailed description of the attached drawings wherein Fig. 1 shows, in top plan, a power-actuated oor scraper conveniently embodying my invention.

Fig. 2 shows the front end elevation of the scraper with portions at the top thereof broken away.

Fig. 3 is a longitudinal section of the scraper taken as indicated by the angled arrows III-III in Fig. 1.

Fig. 4 is a detail sectional view drawn to a larger scale and taken as indicated by the angled arrows IV-IV in Fig. 1; and

Fig. 5 is a View in front elevation of a manually operable oor scraper constructed in accordance with my invention.

As illustrated in Figs. 1-4, my improved poweroperated scraper includes a carriage I with a horizontal frame II which may be conveniently fabricated from structural iron or steel. At the back end of the carriage, the frame I I is. supported on a wheel I2 which is aiiixed centrally of a transverse shaft I3 journaled at its opposite ends in rearwardly-declining bearing arms I4 on said frame. In the illustrated instance, the carriage is intended for lmanual propulsion and is front ends is secured a scraping member which is comprehensively designated by the numeral 21, and which serves to support the carriage I0 at the front. The slide 26 is conned in its reciprocating movements through sliding engagement of forwardly and rearwardly extending rods 28 and 29, 30 thereon in fixed upstanding guide brackets 3| and 32 on the frame II. As shown, the bracket 3| is mounted centrally of the supplemental cross bar 22 of the rframe II, and the bracket 32 centrally of a short cross piece 33 extending between a pair of intermediate longitudinals 34 and 35 of said frame. Mounted for free rotation on spaced about laterally-projecting studs 36 on the slide 26 are rollers 31 which engage opposite sides of an eccentric cam 38 on a crosswiselactuating shaft 39 having journal support in upright bearings 46 and 4I respectively on the intermediate longitudinals 34 and 35 of the frame II. As shown,A the shaft 39 is driven by a belt connection 42 from an electric motor 43 suitably mounted on the carriage I0, and is provided with a ily wheel 44 for maintenance in rotative balance. Extending horizontally rearward from the yoke 25 near its opposite ends are rods 45, 46 which pass through guides 41, 48 on the frame II; and surrounding said rods in the intervals between the yoke and the guide brackets are helical compression springs 5|] and 5I which act as boosters in connection with the motor 43 during impartation o f leftward or active strokes to the slide 26 for communication to the scraping member 21.

In its construction, the scraping member 21 Vincludes a main or supporting component 52 fashioned from stout plate metal with a horizontal portion and with an upwardly inclined rear portion which latter is engaged in clevises at the outer ends of the rods 23 and 24 and rigidly secured to the latter by bolts 53, 54. In turn vsecured to the plate 52 by individual bolts 55 is a transversely arranged series of scraper blades 56 which are of springy sheet metal and concaved inwardly 'for rearwardly and which have their front edges beveled where they engage the oor. The scraper blades 56 are provided with relatively-short sharpened upstanding longitudinal fins 51, which extend rearwardly from the front edges of said blades at the center. Due to their springiness, the scraper blades 56 can yield up and down independently for capacity to overtravel irregularities in the floor, but their freedom in such motion is limited by a transverse aligning bar 58 to which the blades are individuvally secured midway of their lengths by central bolts 59. As shown the shanks of the bolts 59 pass through slots 60 in the bar 58 so that the latter can be adjusted to a certain extent relative to the scraper blades to variantly limit their independent action. Rearwardly of the scraper blades 56 is a series of staggeringly-arranged supplemental scraper blade elements 6I which are likewise fashioned from springy sheet metal. From Figs. 3 and 4 it will be noted that the supplemental scraper elements 6| are substantially upright and concaved at a much sharper curvature than the scraper blades 56. It will also berobserved that the supplemental scraper elements 6I are bent rearwardly at the top as at 62 and there secured to the underside of the horizontal portion of the supporting plate 52 by separate screw bolts 63.

The operation of the scraper is as follows:

Under drive of the motor 43, the slide 26 is constantly reciprocated by the action of the eccentric cam 38 upon the rollers 31, and such movement communicated through the rods 23 and 24 to the scraping member 21 as the carriage I0 is propelled forwardly by means of the handle bar l5, Under the weight of the supported parts on the carriage frame Il, the blades 56 and 6I of the scraping member 21will be effectively held in contact with the `iloor, and by reason of their individual inherent springiness will readily yield up and down independently in passing over surface irregularities in the floor. Incident to the rapid forward thrusts of the scraping member 21, the sharpened front edges of the blades 56 will be forcibly thrust beneath, and thus loosen the hardened and caked material adhering to the oor, while the fins 51 concurrently act to subdivide the loosened material and break it up. Any of the incrustation missed by the blades 51 will be subsequently removed by the supplemental .blades 6| following in their wake. Through provision of thev springs 50, added impetus is given to the vslide 26 during its forward or active movements to minimizev the load in the motor 43 at these times. As a consequence of vthis provision, the use of a much smaller motor than would otherwise be required, is made possible. By upward or downward pressure -on the propelling handle bar l5 and pivoting of the carriage on the wheel'axle I3 at the rear during the progress of the scraper, it will be seen that the pressure of the scraping member 21 relative to the floor may be either augmented or relieved as may be found advantageous, depending upon the resistivity of the incrustation which is to be removed. The use of the single supporting wheel l2 at the rear of the carriage makes steering relatively easy. My improved power-operated floor scraperV is thus not only simple in its construction and highly efficient in its performance, but easily handled aswell.

In the manual type of scraper shown in Fig. 5, the scraping member 21a is identical with the scraping member 21 of Figs. 1-4, and, therefore, in order to preclude repetitive description, all its component parts have been identified with the same reference numerals .previously employed, except for the addition in each instance of the letter a for convenience of more ready distinction. For its manipulation the scraper of Fig. 5 is provided with a grasp rod or handle 65, which, as shown, is engaged in a socket 66 secured to the upturned portion of the plate 52a by rivets 61. The operation of the manual scraper in removing incrustations from the floor, is identical with that hereinbefore described of the power operated type.

Having thus described my invention, I claim:

1. A floor scraper comprising a scraping member which includes a supporting element, and a series of transversely arranged juxtapositioned spring scraping blades individually secured at their tops to said supporting member with capacity to yield independently in overtravelling surface irregularities in the floor while under pressure; and means whereby the scraping member may be propelled over the oor.

2. A floor scraper according to claim 1, including adjustable means whereby the relative freedom accorded the scraping blades may be varied.

3. A floor scraper according to claim 1, in whichthe scraping blades are respectively provided, adjacent their forward edges, with longitudinal upstanding ns for breaking up incrustations loosened .by said blades.

4. yA floor scraper according to claim 1, in which the scraping member includes supplemental scraping means in the wake of the scraping blades for removing any incrustations missed by said blades, said supplemental means being in turn secured to the supporting element. r

5. A iloor scraper according to claim 1, in which the scraping member further includes a plurality of springy supplemental scraping elements which follow in the wake of the scraping blades to subsequently remove any incrustations missed by said blades, and which are in turn individually secured to the supporting element.

6. A oor scraper according to claim 1, in which the scraping memberfurther includes a plurality of transversely and staggeringly arranged supplemental` springy scraping elements which follow in the wake of the scraping blades to subsequently remove any incrustationsmissed by said blades, and which arein turn secured to the supporting element. f

7. A floor scraper comprising ra mobile carriage; a yielding scraping member with a scraping edge bearing on the floor surface; and mechanism for actuating the scraping member including a horizontally reciprocating slide on the car'- riage to which the scraping member is connected, a rotary shaft on the carriage, an eccentric cam on the shaft; and a pair of cooperative rollers on the slide engaging the edge of the eccentric cam from opposite sides.

8. A iioor scraper according to claim 7, in which the mechanism for actuating the slide further includes an electric motor which is supported on the carriage; and transmission means whereby the shaft is driven at reduced speed from the motor.

9. A floor scraper according to claim 7, in which wheel means support the carriage at its rear end; in which the carriage is supported at its front end by the yielding scraping member; and wherein the carriage is provided with handle means whereby it may be propelled and 'guided and whereby it may be pivotally balanced to different extents to vary the scrapingpressure of said scraping member.

10. A floor scraper according to claim A'7, further including booster means to assist the motor during impartation of the forward or active thrusts to the scraping member.

HERBERT FISCHER; 

